databases/tkrzw-python: new port: Python interface for Tkrzw, successor of Kyoto Cabinet

Python interface for Tkrzw library implementing DBM with various
algorithms. Tkrzw features high degrees of performance, concurrency,
scalability and durability.

Tkrzw is a successor of Kyoto Cabinet.

WWW: https://dbmx.net/tkrzw/

PR: 289951
Reported by: Paavo-Einari Kaipila <pkaipila@gmail.com> (new maintainer)